Radioactivity in strange quark matter

Berger, M. S.; Jaffe, R.L.

doi:10.1103/physrevc.35.213

Cited by 224 publications

(250 citation statements)

References 15 publications

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“…Since there are numerous cryopumps in the spectrometer, one must consider the effects on the boiling point of changing the nuclear mass in helium from 4 to 65 u. This is described in detail by Wilks [19], who gives the procedure for determining the boiling point for 65 He; we calculated it to be 7 K. Thus the cryopumps in the system, which operate at a variety of temperatures, but always above 10 K, should not affect the strangelet to 4 He abundance ratio.…”

Section: B Enhancement Of Measured Abundance Limitsmentioning

confidence: 99%

“…Our experiment determined the ratio in air of charge 2 strangelets to 4 This argument depends on the assumption that there are no components in the mass spectrometer that would select strangelets over 4 He. Since there are numerous cryopumps in the spectrometer, one must consider the effects on the boiling point of changing the nuclear mass in helium from 4 to 65 u.…”

Section: B Enhancement Of Measured Abundance Limitsmentioning

confidence: 99%

“…A previous study of such "strangelets" by Chin and Kerman [2] had suggested the possibility that such quark matter might actually be at least a metastable phase of nuclear matter. A mass formula was developed in the context of quarks confined to a (nuclear) bag by Farhi and Jaffe [3] and by Berger and Jaffe [4]; their formula depended only on the bag constant and the strange quark mass in the nuclear medium. It was used to study the possible stability of strangelets as a function of baryon number, as well as possible decay modes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A search for stable strange quark matter nuggets in helium

Vandegriff¹,

Raimann²,

Boyd³

et al. 1996

Physics Letters B

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A search for stable strange quark nuggets has been conducted in helium and argon using a high sensitivity mass spectrometer. The search was guided by a mass formula for strange quark nuggets which suggested that stable strange helium might exist at a mass around 65 u. The chemical similarity of such "strangelets" to noble gas atoms and the gravitational unboundedness of normal helium result in a large enhancement in the sensitivity of such a search. An abundance limit of no more than 2 · 10 −11 strangelets per normal nucleus is imposed by our search over a mass region from 42 to 82 u, with much more stringent limits at most (non-integer) masses.

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Section: B Enhancement Of Measured Abundance Limitsmentioning

confidence: 99%

Section: B Enhancement Of Measured Abundance Limitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A search for stable strange quark matter nuggets in helium

Vandegriff¹,

Raimann²,

Boyd³

et al. 1996

Physics Letters B

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show abstract

“…The stability of strange quark matter with finite volume (strangelets) was also discussed in the MIT bag model. Berger and Jaffe [17] discussed the surface correction for the strangelets, where they found that the surface tension destabilizes strangelets. The curvature contribution was considered by Madsen [18] which is dominant for strangelets with small baryon numbers.…”

Section: Introductionmentioning

confidence: 99%

Strange quark matter in a chiral SU(3) quark mean field model

et al. 2003

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We apply the chiral SU(3) quark mean field model to investigate strange quark matter. The stability of strange quark matter with different strangeness fraction is studied. The interaction between quarks and vector mesons destabilizes the strange quark matter. If the strength of the vector coupling is the same as in hadronic matter, strangelets can not be formed. For the case of β equilibrium, there is no strange quark matter which can be stable against hadron emission even without vector meson interactions.

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“…Strange quark matter could even occur as a decay product of metastable exotic multihypernuclear objects (MEMO's) [10]. The discovery of strangelets would have profound implications beyond the confirmation of the QGP formation: it would establish the existence of strange quark matter (SQM) [11][12][13] [20]. A recent review is given in Ref.…”

mentioning

confidence: 99%

Strangelet Search in Pb-Pb Interactions at 158 GeV/cper Nucleon

et al. 1996

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The NA52 experiment searches for long-lived massive strange quark matter particles, so-called strangelets, produced in Pb-Pb collisions at a beam momentum of p lab 158 A GeV͞c. Upper limits for the production of strangelets at zero degree production angle covering a mass to charge ratio up to 120 GeV͞c 2 and lifetimes t lab * 1.2 ms are given. The data presented here were taken during the 1994 lead beam running period at CERN. [S0031-9007(96) PACS numbers: 25.75. Dw, 12.38.Mh, 24.85.+p The production of strange quark matter (SQM), socalled strangelets, has long been advertised as an ultimate signature for quark-gluon plasma (QGP) formation in ultrarelativistic heavy ion collisions. Strangelets could be formed from the QGP via a strangeness distillation process [1][2][3][4]. Their production is due to a cooling process of the plasma which results in a strong enhancement of the s quarks in the quark phase. The cooling mechanism of the plasma is started by the evaporation of pions, K 1 and K 0 , which carry entropy and antistrangeness away from the system. The strong s-quark enhancement in the baryon rich environment of the plasma favors the formation of strangelets. In contrast to nuclear matter, strangelets consist of approximately the same number of u, d, and s quarks. On the basis of the Pauli exclusion principle such multiquark states become stable owing to the introduction of strangeness as an additional degree of freedom. Depending on the relative s-quark content, strangelets can exist in neutral or charged form. By virtue of the large s-quark content, the charge to mass ratio of strangelets is expected to be small ͑Z͞A , 0.1͒, which is used as a prominent experimental signature. Bag model calculations indicate that for sufficiently large masses ͑A . 10 GeV͞c 2 ͒ strangelets could be stable with respect to strong and weak nucleon emission and therefore detectable in mass spectrometer experiments [5][6][7][8]. Strangelet formation has also been considered in coalescence models [9]. Strange quark matter could even occur as a decay product of metastable exotic multihypernuclear objects (MEMO's) [10]. The discovery of strangelets would have profound implications beyond the confirmation of the QGP formation: it would establish the existence of strange quark matter (SQM) [11][12][13] [20]. A recent review is given in Ref. [21]. During the 1994 Pb period at CERN, the NA52 Collaboration took data to search for positively and negatively charged strangelets resulting from lead-on-lead collisions at an incident beam momentum of 158A GeV͞c. Preliminary results have been already presented [22]. Now the full statistics have been analyzed and the final results are reported here.The experimental setup (Fig. 1) makes use of the existing H6 beam line at the CERN-SPS to identify the secondary particles produced in the lead target. It is a single particle, double-bend focusing spectrometer transmitting charged particles within a momentum bite of 2.8% for rigidities p͞jZj selectable between 5 and 200 GeV͞c with full particle...

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Radioactivity in strange quark matter

Cited by 224 publications

References 15 publications

A search for stable strange quark matter nuggets in helium

A search for stable strange quark matter nuggets in helium

Strange quark matter in a chiral SU(3) quark mean field model

Strangelet Search in Pb-Pb Interactions at 158 GeV/cper Nucleon

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